Document Detail

Diagnostic clues to ectopic pregnancy.
MedLine Citation:
PMID:  18936028     Owner:  NLM     Status:  MEDLINE    
Ectopic pregnancy accounts for approximately 2% of all pregnancies and is the most common cause of pregnancy-related mortality in the first trimester. Initial evaluation consists of hormonal assays and pelvic ultrasonography (US). A history of pelvic pain along with an abnormal beta human chorionic gonadotropin level should trigger an evaluation for an ectopic pregnancy. The fallopian tube is the most common location for an ectopic pregnancy. An adnexal mass that is separate from the ovary and the tubal ring sign are the most common findings of a tubal pregnancy. Other types of ectopic pregnancy include interstitial, cornual, ovarian, cervical, scar, intraabdominal, and heterotopic pregnancy. Interstitial pregnancy occurs when the gestational sac implants in the myometrial segment of the fallopian tube. Cornual pregnancy refers to the implantation of a blastocyst within the cornua of a bicornuate or septate uterus. An ovarian pregnancy occurs when an ovum is fertilized and is retained within the ovary. Cervical pregnancy results from an implantation within the endocervical canal. In a scar pregnancy, implantation takes place within the scar of a prior cesarean section. In an intraabdominal pregnancy, implantation occurs within the intraperitoneal cavity. Heterotopic pregnancy occurs when an intrauterine and an extrauterine pregnancy occur simultaneously. A spectrum of intra- and extrauterine findings may be seen on US images. Although many of the US findings are nonspecific by themselves, when several of them are seen, the specificity of US in depicting an ectopic pregnancy substantially improves.
Edward P Lin; Shweta Bhatt; Vikram S Dogra
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Radiographics : a review publication of the Radiological Society of North America, Inc     Volume:  28     ISSN:  1527-1323     ISO Abbreviation:  Radiographics     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-10-21     Completed Date:  2008-12-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8302501     Medline TA:  Radiographics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1661-71     Citation Subset:  IM    
Copyright Information:
(c) RSNA, 2008.
Department of Imaging Sciences, University of Rochester School of Medicine, Rochester, NY 14642, USA.
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MeSH Terms
Image Enhancement / methods*
Pregnancy, Ectopic / ultrasonography*
Ultrasonography / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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